ASTM 800, Ferrite content (CF8M)
ASTM 800, Ferrite content (CF8M)
(OP)
Three questions:
1. If have worked our the "Volume percent Ferrite" of material ASTM A351 Gr CF8M according to ASTM A800 at 16%. Is there a method of transfering this percentage into a Ferrite number according to ASTM A800? FN?
2. What is the minimum Ferrite percent / FN number possible using the calculation within ASTM A800? for ASTM A351 Gr CF8M?
3. Is it possible to have a ferrite content of 8% or less for ASTM A351 Gr CF8M using the calculation within ASTM A800?
Thanks for any help
1. If have worked our the "Volume percent Ferrite" of material ASTM A351 Gr CF8M according to ASTM A800 at 16%. Is there a method of transfering this percentage into a Ferrite number according to ASTM A800? FN?
2. What is the minimum Ferrite percent / FN number possible using the calculation within ASTM A800? for ASTM A351 Gr CF8M?
3. Is it possible to have a ferrite content of 8% or less for ASTM A351 Gr CF8M using the calculation within ASTM A800?
Thanks for any help





RE: ASTM 800, Ferrite content (CF8M)
http://eagar.mit.edu/EagarPapers/Eagar085.pdf
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RE: ASTM 800, Ferrite content (CF8M)
Answer 2) 0% ferrite percent.
Answer 3) Yes, see answer 2).
Regarding 2) and 3), you need to know the niobium and nitrogen content of your steel before you carry out the calculation.